I have both Xbox One S and PS4 Pro + A standard PS4, I hate the xbox interface its slow and non user friendly thats same on s model still slow, i mainly use it for 4k player and some exclusives(use that term loosely) thats it it might get used 2 times a month if that, My PS4 Pro is used daily, its interface may not look as fancy but its nicer imo less cluttered and its very quick, PlayStation again i feel has better exclusives, Microsoft have none essentially since there all ending up on PC anyway if you dont have aa PC then i guess for you they are exclusive just not by definition of the word
If you have a 4k TV a Pro is worth it if you dont then a standard PS4 is all you need